History 100 Politics and government 78 Local government 23 Foreign relations 22 Labor unions 19 Economic conditions 14 Finance 12 more ... Economics 10 Land tenure 10 Commerce 9 African Americans 8 Bibliography 8 Education 8 Slavery 8 Social conditions 7 Study and teaching 7 Church history 6 Colonies 6 Political parties 6 Constitutional law 5 Courts 5 Histoire 5 Indians of North America 5 Labor and laboring classes 5 Presidents 5 Sovereignty 5 Taxation 5 Banks and banking 4 Church and state 4 Cooperation 4 Debts, Public 4 Election 4 Historiography 4 Law 4 Legislative bodies 4 Powers and duties 4 Working class 4 Administration 3 Agriculture 3 Citizenship 3 less ...